startup script

starter.sh

touch starter.sh
chmod 754 starter.sh
nano starter.sh

# file content:
#!/bin/sh

if [ $(ps aux | grep $USER | grep node | grep -v grep | wc -l | tr -s "\n") -eq 0 ]
then
        export PATH=/usr/local/bin:$PATH
        forever start --sourceDir /path/to/your/node/app main.js >> /path/to/log.txt 2>&1
fi
# end file content


# add it to cron job
sudo nano crontab -e
> @reboot /path/to/starter.sh